Adapter for grinding wheels



April 16; 1946. Q PAUL 2,398,664v

ADAPTER FOR GRINDING WHEELS Filed Sept. 29, 1943 Inventor: Chr 5b D. Pau l v1;; MZMI y v HisAttoney Patented Apr. 16, 1946 UNITED STATES PA'IENTr OFFICE 2,398,664 j AnAn'rEn Fon GRINDING wir-EELS christ D. raul, Dearborn, Mich. Application september 29, 194s, seal. No. 504,280- i 40mm. (o1. si-ifss)I The present invention is an adapterl for grindingwheels. It is: one-*ofi the objects of the inventionto provide a simple, relatively inexpensive grinding wheel adapter which may be mounted onthe driven spindle of commercial grinding machines. Another object of the invention is to provide a grinding wheel adapter which permits reversal of the grinding wheel without removal from the adapter. A further object of the invention is the provision of a compact grinding Wheel adapter unit. A further object of the invention is the provision of a grinding wheel adapter in which the grinding wheel is so mounted and supported that it will run true at all times. Other objects will appear hereinafter.

The novel features which are characteristic of my invention are set forth with particularity in the appended claims. My invention itself, however, will best be understood from reference to the following specification when considered in connection with the accompanying drawing in which the single figure is a cross sectional view of a grinding wheel adapter embodying the features of the present invention.

Referring more particularly to the drawing, I have indicated at I a spindle housing provided with a tapered driven spindle 2 on which the adapter is mounted. The spindle 2 has an integral, reduced, threaded end portion 3. The grinding wheel adapter comprises a hollow cylindrical member 4 which has screw threaded end portions 5 and 6. Puller means, not shown, may be secured to the screw threaded portions 5 and 6 to facilitate removal of the adapter from the spindle 2. A grinding wheel 1 may be mounted on and secured on the adapter intermediate the ends thereof. An external integral flange 8 on the hollow member 4 engages the grinding wheel 1 and limits its longitudinal movement in one direction. A nut 9, which has the same external diameter as the ange 8, is mounted on the screw threaded portion 5. The grinding wheel 1 is rigidly clamped and held in position betweenthe ange 8 and the nut 9. To prevent the nut 9 from being loosened when the direction of rotation is reversed, a steel lock washer I having two oppositely disposed projections which t into opposite keyways on threaded portion is interposed between the grinding wheel and the nut 9.

The interior of the cylindrical member 4 com prises two similar, oppositely disposed and abutting tapered bearing surfaces II and I2, each having the same taper as the spindle 2. -Each bearing surface has a circumferential recess I3 or I4 which provides an internal circular shoulder ylili or I6 respectively which is perpendicular tothe axis of the adapter and which in operation is positioned adjacent theouter 'end por.- tion of the tapered spindle 2. A nut I1, engages the screw threaded portion 3` of the driven spindle 2. The nut I1 has a reduced inner end portion providing a circular shoulder 20 which is perpendicular to its axis and adapted to engage the shoulder I5 or IE on the hollow member 4 and thereby hold the latter in position on the driven spindle 2. Since the nut I1 contacts the cylindrical member 4 only at a point very close to the outer end of the driven spindle rather than at the outer end of the hollow member 4, perfect alignment is obtained between the parts during operation and the grinding wheel 1 always runs true. Circular openings 2l on each of the nuts I1 and 9 and inthe ange 8 permit easy adjustment of such parts.

When the grinding wheel becomes worn down on one side, the nut I1 is removed and the cylindrical member 4 and attached grinding wheel are pulled from the spindle 2 and reversed thereon in which position the `tapered surface I2, rather than the surface II, contacts the driven spindle 2. The shoulder 20 on the nut I1 will then engage the shoulder I5 to hold the adapter in its new position on the driven spindle. The nut I1 is made quite large so that it may be tightened or loosened easily by hand thereby eliminating the necessity for tapping the nut tight or loose with consequent injury to ball bearving type spindles.

Since the grinding wheel 1 may be reversed on the driven spindle without removing the wheel from the adapter, a saving of time is eiected when such change is made. A further advantage of the present adapter is that when one side of the grinding wheel is worn, the other `side may be employed without redressing the wheel. Since the grinding wheel is mounted at a point substantially equidistant from the ends of the cylindrical member 4, a compact structure is obtained. Furthermore, since the nut I1 is adapted to engage shoulder I5 or I6 at a point closely adjacent the tapered end of spindle 2, the grinding wheel will always be held on the spindle in such a manner that it will run dead true in either position of the wheel. On some machines where the driven spindle is double-ended the use of the present adapter effects considerable saving in finishing time since it is possible to use either end of the spindle and at the same time employ the grinding wheel either way to the best advantage.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. A grinding wheel adapter comprising a reversible, hollow cylindrical member having oppositely disposed, tapered internal bearing surfaces, means for mounting a grinding Wheel on said member at a point substantially equidistant from Athe ends thereof, means for rigidly holding said grinding wheel 'in position on said cylindrical member,v ashoulder onthe innersurface of said 10 hold said member in position on a driven spindle 4 having the same taper as said surfaces.

2.- A grinding wheel adapter comprising `a hol` low cylindrical member which may be mounted shoulder to hold said adapter in position on said driven spindle.

3. A grinding Wheel adapter comprising a hollow cylindrical member which may be secured in position on a tapered driven spindle, means for mounting a grinding Wheel on said member, said member having similar internal, but oppositely disposed, tapered abutting bearing surfaces,

each of said surfaces having a circumferential recess provided with a circular shoulder adjacent the point Yof intersection of saidtapered bearing surfaces, and means adapted to engage said :shoulders and said driven spindle.

on a tapered driven spindle, said member having internal, similar, but oppositely disposed, abut-V ting tapered bearing surfaces adapted tot directly onto the tapered surface of said driven spindle, each of said internal tapered surfaces having a` recessed portion providing a circular shoulder thereon, means for mounting a grinding Wheel and securingit in position on said member, and means adapted to engage said circular .posed mounting a grinding Wheel on said member, each i of `said internal bearing surfaces being adapted 

